Lock-nut.



PATENTED FEB. 6, 1906.

0. RYSTROMQE LOCK NUT.

APPLICATION FILED MAR.16,1903.

wz... x k M E Q Q O V? OHARLES RYSTROM, OF ROCKFORD, ILLINOIS.

LOCK-NUT.

Specification of Letters Patent.

Patented Feb. 6, 1906.

Application filed March 16, 1908. Boris-1N0. 147,992-

To all whom it may concern:

Be it known that I, CHARLES. RYSTROM, a citizen of the United States, residing at Rockford, in the county of Winnebago and State of Illinois, have invented certain new and useful Improvements in Look-Nuts, of which the following is a specification.

This invention relates to improvements in lock-nuts in which the nut is composed of spiral coils, the coils being compressed while being internally threaded; and my'improvements relate to means for holding the coils compressed after bein threaded and forms a part of the nut until tie nut is placed on the bolt, when the clamping means are removed and the coils allowed to exert pressure on the threads of the bolt.

In the accompanying drawings, Fi ure 1 is an isometrical representation of a ock-nut with my clamping means in connection therewith. Fi 2 is an isometrical representation of one of t e clamping devices.

The lock-nut is the same as that patented to Charles H. Smith, No. 653,852, dated July 17, 1900, being made up of coils 1 in spiral form, and when coiled the coils are somewhat open. The nut is then placed in a clampin device, and the coils are pressed together an the central opening 2 screw-threaded, and when the clamping device is removed the coils will assume their normal position.

After the central 0 ening has been screw threaded and after t e clamping device has been removed I place in this instance two,

clamping-bars 3 (shown at Fig. 2) on the nut, so that t e hooked ends 4 will en age the ends of the nut, as shown at Fig. 1. The clampin device is then removed, and the clamps wi hold the coils of the nut compressed. These clamping-bars form a part of the nut until the nut is turned on the bolt nearly into position.

,When the clamping-bars are removed and a wrench applied to the nut, it may be turned hard up against the work. The spring force of the coils of the nut is suflicient to prevent the loosening of the nut, and considerable force is required to turn it. It is necessary to hold the coils of the nut compressed until the coils have enga ed a thread of the bolt. Otherwise the t eads of the nut would become crossed with the threads of the bolt, and it could not be turned on.

I claim as my invention- 1. As a new article of manufacture, a locknut composed of a spirally-coiled body having flattened outer aces an internal screw threaded opening, the coils in their normal position being so arated, and means carried y the nut for ho ding the coils compressed.

2. As a new article of manufacture, a locknut composed of a spirally-coiled body havin an internal screw-threaded opening the co1ls of which normally tend to separate and in which osition they are out of register, and removable clips earned by opposite sides 0 the nut normally tending to old the coils compressed and the threads in continuous register.

3. As a new article of manufacture, a resilient, spirally-coiled body having an mternal screw-threaded opening an having external 'fiattened portions, and a (plurahty of removable clips holding said coile body in a compressed condition, each of said clips being flattened on its outer side and bearing internally a ainst one of the flattened portions of said coi ed body.

4. As a new article of manufacture, a lock nut comprising a com ressible and expansible spira ly-coiled b0 having an internal screw threaded openmg, the threads of which are continuous when the coils are compressed and broken when the coils are expanded, said nut being adapted for application to a bolt only when the coils are compressed, and means forming apart of the article and engaging the ends thereof for bolding the coils o the nut compressed and the threads continuous so that the nut may be ap lied to a bolt, said means being remova e to permit the coils of the nut to expand.

Witnesses:

CHARLES RYSTROM.

A. O. BEHEL, A

E. BEHEL. 

